# US 10,788,992 B2 · System and method for efficient access for remote storage devices > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,788,992 B2 - Document ID: US10788992B2 - Status: Granted - Kind: B2 - Application number: 15/975,379 - Filed: 2018-05-09 - Published: 2018-09-13 - Granted: 2020-09-29 - Earliest claimed: 2014-07-30 - Assignees: Excelero Storage Ltd. - Applicants: Excelero Storage Ltd. - Inventors: Yaniv Romem; Omri Mann; Ofer Oshri - Web page: https://patentgrep.com/patent/US10788992B2 ## CPC - G06F 3/0611: {in relation to response time} - G06F 3/0604: {Improving or facilitating administration, e.g. storage management} - G06F 3/0637: {Permissions} - G06F 3/064: {Management of blocks} - G06F 3/0647: {Migration mechanisms} - G06F 3/065: {Replication mechanisms} - G06F 3/0652: {Erasing, e.g. deleting, data cleaning, moving of data to a wastebasket} - G06F 3/0659: {Command handling arrangements, e.g. command buffers, queues, command scheduling} - G06F 3/067: {Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]} - G06F 3/0688: {Non-volatile semiconductor memory arrays} - G06F 3/0689: {Disk arrays, e.g. RAID, JBOD} - G06F 12/1081: for peripheral access to main memory, e.g. direct memory access [DMA] - G06F 15/167: using a common memory, e.g. mailbox - G06F 15/17331: {Distributed shared memory [DSM], e.g. remote direct memory access [RDMA]} - H04L 12/06: Answer-back mechanisms or circuits - H04L 12/6418: {Hybrid transport} - H04L 67/1097: for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS] - G06F 2212/65: Details of virtual memory and virtual address translation - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A client device for accessing remote storage devices. The client device includes: a processing unit communicatively connected to: a network interface and a memory; the network interface configured to communicatively connect the client device to a network comprising the client device and a storage server, the storage server comprising one or more storage devices, a remote direct memory access network interface controller (rNIC), and a primary processing unit; the memory containing instructions, that, when executed by the processing unit, configure the client device to: send an input/output (I/O) request for a storage device of the one or more storage devices; receive an indication from the rNIC based on the sent I/O request, the indication including an interrupt generated by the rNIC in response to the I/O request. ## Claims ### Claim 1 A client device for accessing remote storage devices, the client device comprising: a processing unit communicatively connected to a network interface and a memory; wherein the network interface is configured to communicatively connect the client device to a network comprising the client device and a storage server, the storage server comprising at least one storage device, a remote direct memory access network interface controller (rNIC), and a primary processing unit; the memory containing instructions, that, when executed by the processing unit, configure the client device to: send an input/output (I/O) request for a storage device of the one or more storage devices; receive an indication from the rNIC based on the sent I/O request, the indication including an interrupt generated by the rNIC in response to the I/O request, wherein the indication received from the rNIC indicates if the I/O request has been either completed or not completed, wherein the interrupt is generated by the rNIC in response to the rNIC sending the I/O request to the storage device and intercepting, from the storage device, a response respective of the I/O request intended for the primary processing unit. ### Claim 2 (depends on 1) The client device of claim 1, wherein the I/O request includes at least one of: a storage device identifier, a storage block, a storage address, and data to be written to at least one of the at least one storage device. ### Claim 3 (depends on 1) The client device of claim 1, wherein the indication is received before the I/O request has been executed in its entirety by the storage device. ### Claim 4 (depends on 1) The client device of claim 1, wherein the client device is further configured to: receive a response respective of the I/O request. ### Claim 5 (depends on 4) The client device of claim 4, wherein the received response is stored directly in the memory of the client device. ### Claim 6 (depends on 1) The client device of claim 1, wherein the client device is configured to support remote direct memory access (RDMA) protocol by the rNIC. ### Claim 7 A non-transitory computer readable medium having stored thereon instructions for causing a processing circuitry to perform a process, the process comprising: sending an input/output (I/O) request for a storage device of at least one storage device over a network connection; and receiving an indication from a remote direct memory access network interface controller (rNIC), the indication including an interrupt generated by the rNIC in response to the I/O request, wherein the indication received from the rNIC indicates if the I/O request has been either completed or not completed, wherein the interrupt is generated by the rNIC in response to the rNIC sending the I/O request to the storage device and intercepting, from the storage device, a response respective of the I/O request intended for the primary processing unit. ### Claim 8 A method for providing a client device remote access to a storage server controlling at least one storage device by a network interface controller (NIC) comprising a processor, a first memory and a second memory, the method comprising: sending an input/output (I/O) request for a storage device of at least one storage device over a network connection; and receiving an indication from a remote direct memory access network interface controller (rNIC), the indication including an interrupt generated by the rNIC in response to the I/O request, wherein the indication received from the rNIC indicates if the I/O request has been either completed or not completed, wherein the interrupt is generated by the rNIC in response to the rNIC sending the I/O request to the storage device and intercepting, from the storage device, a response respective of the I/O request intended for the primary processing unit. ### Claim 9 (depends on 8) The method of claim 8, wherein the I/O request includes at least one of: a storage device identifier, a storage block, a storage address, and data to be written to at least one of the at least one storage device. ### Claim 10 (depends on 8) The method of claim 8, wherein the indication received from the rNIC indicates if the I/O request has been either completed or not completed. ### Claim 11 (depends on 8) The method of claim 8, wherein the indication is received before the I/O request has been executed in its entirety by the storage device. ### Claim 12 (depends on 8) The method of claim 8, further comprising: receiving a response respective of the I/O request.